Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1 | /* |
| 2 | * generic helper functions for handling video4linux capture buffers |
| 3 | * |
| 4 | * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org> |
| 5 | * |
| 6 | * Highly based on video-buf written originally by: |
| 7 | * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> |
| 8 | * (c) 2006 Mauro Carvalho Chehab, <mchehab@infradead.org> |
| 9 | * (c) 2006 Ted Walther and John Sokol |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 |
| 14 | */ |
| 15 | |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/moduleparam.h> |
Andrea Righi | 27ac792 | 2008-07-23 21:28:13 -0700 | [diff] [blame] | 19 | #include <linux/mm.h> |
Alexey Dobriyan | d43c36d | 2009-10-07 17:09:06 +0400 | [diff] [blame] | 20 | #include <linux/sched.h> |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 21 | #include <linux/slab.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | |
| 24 | #include <media/videobuf-core.h> |
| 25 | |
| 26 | #define MAGIC_BUFFER 0x20070728 |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 27 | #define MAGIC_CHECK(is, should) \ |
| 28 | do { \ |
| 29 | if (unlikely((is) != (should))) { \ |
| 30 | printk(KERN_ERR \ |
| 31 | "magic mismatch: %x (expected %x)\n", \ |
| 32 | is, should); \ |
| 33 | BUG(); \ |
| 34 | } \ |
| 35 | } while (0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 36 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 37 | static int debug; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 38 | module_param(debug, int, 0644); |
| 39 | |
| 40 | MODULE_DESCRIPTION("helper module to manage video4linux buffers"); |
| 41 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>"); |
| 42 | MODULE_LICENSE("GPL"); |
| 43 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 44 | #define dprintk(level, fmt, arg...) \ |
| 45 | do { \ |
| 46 | if (debug >= level) \ |
| 47 | printk(KERN_DEBUG "vbuf: " fmt, ## arg); \ |
| 48 | } while (0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 49 | |
| 50 | /* --------------------------------------------------------------------- */ |
| 51 | |
| 52 | #define CALL(q, f, arg...) \ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 53 | ((q->int_ops->f) ? q->int_ops->f(arg) : 0) |
Hans Verkuil | a8d54e4 | 2014-11-05 04:51:26 -0300 | [diff] [blame] | 54 | #define CALLPTR(q, f, arg...) \ |
| 55 | ((q->int_ops->f) ? q->int_ops->f(arg) : NULL) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 56 | |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame] | 57 | struct videobuf_buffer *videobuf_alloc_vb(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 58 | { |
| 59 | struct videobuf_buffer *vb; |
| 60 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 61 | BUG_ON(q->msize < sizeof(*vb)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 62 | |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame] | 63 | if (!q->int_ops || !q->int_ops->alloc_vb) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 64 | printk(KERN_ERR "No specific ops defined!\n"); |
| 65 | BUG(); |
| 66 | } |
| 67 | |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame] | 68 | vb = q->int_ops->alloc_vb(q->msize); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 69 | if (NULL != vb) { |
| 70 | init_waitqueue_head(&vb->done); |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 71 | vb->magic = MAGIC_BUFFER; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | return vb; |
| 75 | } |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame] | 76 | EXPORT_SYMBOL_GPL(videobuf_alloc_vb); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 77 | |
Guennadi Liakhovetski | 5eba1726e | 2016-02-21 13:34:59 -0300 | [diff] [blame] | 78 | static int state_neither_active_nor_queued(struct videobuf_queue *q, |
| 79 | struct videobuf_buffer *vb) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 80 | { |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 81 | unsigned long flags; |
| 82 | bool rc; |
| 83 | |
| 84 | spin_lock_irqsave(q->irqlock, flags); |
| 85 | rc = vb->state != VIDEOBUF_ACTIVE && vb->state != VIDEOBUF_QUEUED; |
| 86 | spin_unlock_irqrestore(q->irqlock, flags); |
| 87 | return rc; |
| 88 | }; |
| 89 | |
| 90 | int videobuf_waiton(struct videobuf_queue *q, struct videobuf_buffer *vb, |
| 91 | int non_blocking, int intr) |
| 92 | { |
| 93 | bool is_ext_locked; |
| 94 | int ret = 0; |
| 95 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 96 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 97 | |
| 98 | if (non_blocking) { |
Guennadi Liakhovetski | 5eba1726e | 2016-02-21 13:34:59 -0300 | [diff] [blame] | 99 | if (state_neither_active_nor_queued(q, vb)) |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 100 | return 0; |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 101 | return -EAGAIN; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 102 | } |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 103 | |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 104 | is_ext_locked = q->ext_lock && mutex_is_locked(q->ext_lock); |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 105 | |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 106 | /* Release vdev lock to prevent this wait from blocking outside access to |
| 107 | the device. */ |
| 108 | if (is_ext_locked) |
| 109 | mutex_unlock(q->ext_lock); |
| 110 | if (intr) |
Guennadi Liakhovetski | 5eba1726e | 2016-02-21 13:34:59 -0300 | [diff] [blame] | 111 | ret = wait_event_interruptible(vb->done, |
| 112 | state_neither_active_nor_queued(q, vb)); |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 113 | else |
Guennadi Liakhovetski | 5eba1726e | 2016-02-21 13:34:59 -0300 | [diff] [blame] | 114 | wait_event(vb->done, state_neither_active_nor_queued(q, vb)); |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 115 | /* Relock */ |
| 116 | if (is_ext_locked) |
| 117 | mutex_lock(q->ext_lock); |
| 118 | |
| 119 | return ret; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 120 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 121 | EXPORT_SYMBOL_GPL(videobuf_waiton); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 122 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 123 | int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 124 | struct v4l2_framebuffer *fbuf) |
| 125 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 126 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
| 127 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 128 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 129 | return CALL(q, iolock, q, vb, fbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 130 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 131 | EXPORT_SYMBOL_GPL(videobuf_iolock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 132 | |
Hans Verkuil | f4fce60 | 2010-03-28 08:33:23 -0300 | [diff] [blame] | 133 | void *videobuf_queue_to_vaddr(struct videobuf_queue *q, |
| 134 | struct videobuf_buffer *buf) |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 135 | { |
Hans Verkuil | 037c75e | 2010-03-28 08:18:37 -0300 | [diff] [blame] | 136 | if (q->int_ops->vaddr) |
| 137 | return q->int_ops->vaddr(buf); |
Hans Verkuil | f4fce60 | 2010-03-28 08:33:23 -0300 | [diff] [blame] | 138 | return NULL; |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 139 | } |
Hans Verkuil | f4fce60 | 2010-03-28 08:33:23 -0300 | [diff] [blame] | 140 | EXPORT_SYMBOL_GPL(videobuf_queue_to_vaddr); |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 141 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 142 | /* --------------------------------------------------------------------- */ |
| 143 | |
| 144 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 145 | void videobuf_queue_core_init(struct videobuf_queue *q, |
Jonathan Corbet | 38a54f3 | 2009-11-17 19:43:41 -0300 | [diff] [blame] | 146 | const struct videobuf_queue_ops *ops, |
Guennadi Liakhovetski | e9bcf66 | 2008-04-22 14:46:02 -0300 | [diff] [blame] | 147 | struct device *dev, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 148 | spinlock_t *irqlock, |
| 149 | enum v4l2_buf_type type, |
| 150 | enum v4l2_field field, |
| 151 | unsigned int msize, |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 152 | void *priv, |
Hans Verkuil | 08bff03 | 2010-09-20 17:39:46 -0300 | [diff] [blame] | 153 | struct videobuf_qtype_ops *int_ops, |
| 154 | struct mutex *ext_lock) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 155 | { |
Figo.zhang | 96ceea2 | 2009-06-02 23:01:04 -0300 | [diff] [blame] | 156 | BUG_ON(!q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 157 | memset(q, 0, sizeof(*q)); |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 158 | q->irqlock = irqlock; |
Hans Verkuil | 08bff03 | 2010-09-20 17:39:46 -0300 | [diff] [blame] | 159 | q->ext_lock = ext_lock; |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 160 | q->dev = dev; |
| 161 | q->type = type; |
| 162 | q->field = field; |
| 163 | q->msize = msize; |
| 164 | q->ops = ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 165 | q->priv_data = priv; |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 166 | q->int_ops = int_ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 167 | |
| 168 | /* All buffer operations are mandatory */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 169 | BUG_ON(!q->ops->buf_setup); |
| 170 | BUG_ON(!q->ops->buf_prepare); |
| 171 | BUG_ON(!q->ops->buf_queue); |
| 172 | BUG_ON(!q->ops->buf_release); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 173 | |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 174 | /* Lock is mandatory for queue_cancel to work */ |
| 175 | BUG_ON(!irqlock); |
| 176 | |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 177 | /* Having implementations for abstract methods are mandatory */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 178 | BUG_ON(!q->int_ops); |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 179 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 180 | mutex_init(&q->vb_lock); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 181 | init_waitqueue_head(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 182 | INIT_LIST_HEAD(&q->stream); |
| 183 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 184 | EXPORT_SYMBOL_GPL(videobuf_queue_core_init); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 185 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 186 | /* Locking: Only usage in bttv unsafe find way to remove */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 187 | int videobuf_queue_is_busy(struct videobuf_queue *q) |
| 188 | { |
| 189 | int i; |
| 190 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 191 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 192 | |
| 193 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 194 | dprintk(1, "busy: streaming active\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 195 | return 1; |
| 196 | } |
| 197 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 198 | dprintk(1, "busy: pending read #1\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 199 | return 1; |
| 200 | } |
| 201 | if (q->read_buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 202 | dprintk(1, "busy: pending read #2\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 203 | return 1; |
| 204 | } |
| 205 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 206 | if (NULL == q->bufs[i]) |
| 207 | continue; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 208 | if (q->bufs[i]->map) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 209 | dprintk(1, "busy: buffer #%d mapped\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 210 | return 1; |
| 211 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 212 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 213 | dprintk(1, "busy: buffer #%d queued\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 214 | return 1; |
| 215 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 216 | if (q->bufs[i]->state == VIDEOBUF_ACTIVE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 217 | dprintk(1, "busy: buffer #%d avtive\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 218 | return 1; |
| 219 | } |
| 220 | } |
| 221 | return 0; |
| 222 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 223 | EXPORT_SYMBOL_GPL(videobuf_queue_is_busy); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 224 | |
Pawel Osciak | a438d6d | 2010-05-11 10:36:29 -0300 | [diff] [blame] | 225 | /** |
| 226 | * __videobuf_free() - free all the buffers and their control structures |
| 227 | * |
| 228 | * This function can only be called if streaming/reading is off, i.e. no buffers |
| 229 | * are under control of the driver. |
| 230 | */ |
| 231 | /* Locking: Caller holds q->vb_lock */ |
| 232 | static int __videobuf_free(struct videobuf_queue *q) |
| 233 | { |
| 234 | int i; |
| 235 | |
| 236 | dprintk(1, "%s\n", __func__); |
| 237 | if (!q) |
| 238 | return 0; |
| 239 | |
| 240 | if (q->streaming || q->reading) { |
| 241 | dprintk(1, "Cannot free buffers when streaming or reading\n"); |
| 242 | return -EBUSY; |
| 243 | } |
| 244 | |
| 245 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
| 246 | |
| 247 | for (i = 0; i < VIDEO_MAX_FRAME; i++) |
| 248 | if (q->bufs[i] && q->bufs[i]->map) { |
| 249 | dprintk(1, "Cannot free mmapped buffers\n"); |
| 250 | return -EBUSY; |
| 251 | } |
| 252 | |
| 253 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 254 | if (NULL == q->bufs[i]) |
| 255 | continue; |
| 256 | q->ops->buf_release(q, q->bufs[i]); |
| 257 | kfree(q->bufs[i]); |
| 258 | q->bufs[i] = NULL; |
| 259 | } |
| 260 | |
| 261 | return 0; |
| 262 | } |
| 263 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 264 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 265 | void videobuf_queue_cancel(struct videobuf_queue *q) |
| 266 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 267 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 268 | int i; |
| 269 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 270 | q->streaming = 0; |
| 271 | q->reading = 0; |
| 272 | wake_up_interruptible_sync(&q->wait); |
| 273 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 274 | /* remove queued buffers from list */ |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 275 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 276 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 277 | if (NULL == q->bufs[i]) |
| 278 | continue; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 279 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 280 | list_del(&q->bufs[i]->queue); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 281 | q->bufs[i]->state = VIDEOBUF_ERROR; |
Brandon Philips | b608f43 | 2008-04-02 18:10:57 -0300 | [diff] [blame] | 282 | wake_up_all(&q->bufs[i]->done); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 283 | } |
| 284 | } |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 285 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 286 | |
| 287 | /* free all buffers + clear queue */ |
| 288 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 289 | if (NULL == q->bufs[i]) |
| 290 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 291 | q->ops->buf_release(q, q->bufs[i]); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 292 | } |
| 293 | INIT_LIST_HEAD(&q->stream); |
| 294 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 295 | EXPORT_SYMBOL_GPL(videobuf_queue_cancel); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 296 | |
| 297 | /* --------------------------------------------------------------------- */ |
| 298 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 299 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 300 | enum v4l2_field videobuf_next_field(struct videobuf_queue *q) |
| 301 | { |
| 302 | enum v4l2_field field = q->field; |
| 303 | |
| 304 | BUG_ON(V4L2_FIELD_ANY == field); |
| 305 | |
| 306 | if (V4L2_FIELD_ALTERNATE == field) { |
| 307 | if (V4L2_FIELD_TOP == q->last) { |
| 308 | field = V4L2_FIELD_BOTTOM; |
| 309 | q->last = V4L2_FIELD_BOTTOM; |
| 310 | } else { |
| 311 | field = V4L2_FIELD_TOP; |
| 312 | q->last = V4L2_FIELD_TOP; |
| 313 | } |
| 314 | } |
| 315 | return field; |
| 316 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 317 | EXPORT_SYMBOL_GPL(videobuf_next_field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 318 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 319 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 320 | static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b, |
| 321 | struct videobuf_buffer *vb, enum v4l2_buf_type type) |
| 322 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 323 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
| 324 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 325 | |
| 326 | b->index = vb->i; |
| 327 | b->type = type; |
| 328 | |
| 329 | b->memory = vb->memory; |
| 330 | switch (b->memory) { |
| 331 | case V4L2_MEMORY_MMAP: |
| 332 | b->m.offset = vb->boff; |
| 333 | b->length = vb->bsize; |
| 334 | break; |
| 335 | case V4L2_MEMORY_USERPTR: |
| 336 | b->m.userptr = vb->baddr; |
| 337 | b->length = vb->bsize; |
| 338 | break; |
| 339 | case V4L2_MEMORY_OVERLAY: |
| 340 | b->m.offset = vb->boff; |
| 341 | break; |
Sumit Semwal | 3c3016b | 2012-06-14 10:37:38 -0300 | [diff] [blame] | 342 | case V4L2_MEMORY_DMABUF: |
| 343 | /* DMABUF is not handled in videobuf framework */ |
| 344 | break; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 345 | } |
| 346 | |
Sakari Ailus | 1b18e7a | 2012-10-22 17:10:16 -0300 | [diff] [blame] | 347 | b->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 348 | if (vb->map) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 349 | b->flags |= V4L2_BUF_FLAG_MAPPED; |
| 350 | |
| 351 | switch (vb->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 352 | case VIDEOBUF_PREPARED: |
| 353 | case VIDEOBUF_QUEUED: |
| 354 | case VIDEOBUF_ACTIVE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 355 | b->flags |= V4L2_BUF_FLAG_QUEUED; |
| 356 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 357 | case VIDEOBUF_ERROR: |
Hans Verkuil | b2dfd1a | 2010-04-28 04:05:22 -0300 | [diff] [blame] | 358 | b->flags |= V4L2_BUF_FLAG_ERROR; |
| 359 | /* fall through */ |
| 360 | case VIDEOBUF_DONE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 361 | b->flags |= V4L2_BUF_FLAG_DONE; |
| 362 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 363 | case VIDEOBUF_NEEDS_INIT: |
| 364 | case VIDEOBUF_IDLE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 365 | /* nothing */ |
| 366 | break; |
| 367 | } |
| 368 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 369 | b->field = vb->field; |
| 370 | b->timestamp = vb->ts; |
| 371 | b->bytesused = vb->size; |
| 372 | b->sequence = vb->field_count >> 1; |
| 373 | } |
| 374 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 375 | int videobuf_mmap_free(struct videobuf_queue *q) |
| 376 | { |
| 377 | int ret; |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 378 | videobuf_queue_lock(q); |
Pawel Osciak | a438d6d | 2010-05-11 10:36:29 -0300 | [diff] [blame] | 379 | ret = __videobuf_free(q); |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 380 | videobuf_queue_unlock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 381 | return ret; |
| 382 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 383 | EXPORT_SYMBOL_GPL(videobuf_mmap_free); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 384 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 385 | /* Locking: Caller holds q->vb_lock */ |
Arjan van de Ven | 81b2dbc | 2008-05-20 09:53:52 -0700 | [diff] [blame] | 386 | int __videobuf_mmap_setup(struct videobuf_queue *q, |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 387 | unsigned int bcount, unsigned int bsize, |
| 388 | enum v4l2_memory memory) |
| 389 | { |
| 390 | unsigned int i; |
| 391 | int err; |
| 392 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 393 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 394 | |
Pawel Osciak | a438d6d | 2010-05-11 10:36:29 -0300 | [diff] [blame] | 395 | err = __videobuf_free(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 396 | if (0 != err) |
| 397 | return err; |
| 398 | |
| 399 | /* Allocate and initialize buffers */ |
| 400 | for (i = 0; i < bcount; i++) { |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame] | 401 | q->bufs[i] = videobuf_alloc_vb(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 402 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 403 | if (NULL == q->bufs[i]) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 404 | break; |
| 405 | |
| 406 | q->bufs[i]->i = i; |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 407 | q->bufs[i]->memory = memory; |
| 408 | q->bufs[i]->bsize = bsize; |
| 409 | switch (memory) { |
| 410 | case V4L2_MEMORY_MMAP: |
Tuukka Toivonen | 7cbefad | 2009-07-23 10:56:25 -0300 | [diff] [blame] | 411 | q->bufs[i]->boff = PAGE_ALIGN(bsize) * i; |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 412 | break; |
| 413 | case V4L2_MEMORY_USERPTR: |
| 414 | case V4L2_MEMORY_OVERLAY: |
Sumit Semwal | 3c3016b | 2012-06-14 10:37:38 -0300 | [diff] [blame] | 415 | case V4L2_MEMORY_DMABUF: |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 416 | /* nothing */ |
| 417 | break; |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | if (!i) |
| 422 | return -ENOMEM; |
| 423 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 424 | dprintk(1, "mmap setup: %d buffers, %d bytes each\n", i, bsize); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 425 | |
| 426 | return i; |
| 427 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 428 | EXPORT_SYMBOL_GPL(__videobuf_mmap_setup); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 429 | |
| 430 | int videobuf_mmap_setup(struct videobuf_queue *q, |
| 431 | unsigned int bcount, unsigned int bsize, |
| 432 | enum v4l2_memory memory) |
| 433 | { |
| 434 | int ret; |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 435 | videobuf_queue_lock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 436 | ret = __videobuf_mmap_setup(q, bcount, bsize, memory); |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 437 | videobuf_queue_unlock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 438 | return ret; |
| 439 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 440 | EXPORT_SYMBOL_GPL(videobuf_mmap_setup); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 441 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 442 | int videobuf_reqbufs(struct videobuf_queue *q, |
| 443 | struct v4l2_requestbuffers *req) |
| 444 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 445 | unsigned int size, count; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 446 | int retval; |
| 447 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 448 | if (req->memory != V4L2_MEMORY_MMAP && |
| 449 | req->memory != V4L2_MEMORY_USERPTR && |
| 450 | req->memory != V4L2_MEMORY_OVERLAY) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 451 | dprintk(1, "reqbufs: memory type invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 452 | return -EINVAL; |
| 453 | } |
| 454 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 455 | videobuf_queue_lock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 456 | if (req->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 457 | dprintk(1, "reqbufs: queue type invalid\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 458 | retval = -EINVAL; |
| 459 | goto done; |
| 460 | } |
| 461 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 462 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 463 | dprintk(1, "reqbufs: streaming already exists\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 464 | retval = -EBUSY; |
| 465 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 466 | } |
| 467 | if (!list_empty(&q->stream)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 468 | dprintk(1, "reqbufs: stream running\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 469 | retval = -EBUSY; |
| 470 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 471 | } |
| 472 | |
Hans de Goede | b7900ee | 2014-08-31 07:19:21 -0300 | [diff] [blame] | 473 | if (req->count == 0) { |
| 474 | dprintk(1, "reqbufs: count invalid (%d)\n", req->count); |
| 475 | retval = __videobuf_free(q); |
| 476 | goto done; |
| 477 | } |
| 478 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 479 | count = req->count; |
| 480 | if (count > VIDEO_MAX_FRAME) |
| 481 | count = VIDEO_MAX_FRAME; |
| 482 | size = 0; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 483 | q->ops->buf_setup(q, &count, &size); |
Márton Németh | 296372e | 2009-11-22 18:03:05 -0300 | [diff] [blame] | 484 | dprintk(1, "reqbufs: bufs=%d, size=0x%x [%u pages total]\n", |
| 485 | count, size, |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 486 | (unsigned int)((count * PAGE_ALIGN(size)) >> PAGE_SHIFT)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 487 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 488 | retval = __videobuf_mmap_setup(q, count, size, req->memory); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 489 | if (retval < 0) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 490 | dprintk(1, "reqbufs: mmap setup returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 491 | goto done; |
| 492 | } |
| 493 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 494 | req->count = retval; |
Németh Márton | 925d74a | 2009-04-29 15:57:24 -0300 | [diff] [blame] | 495 | retval = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 496 | |
| 497 | done: |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 498 | videobuf_queue_unlock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 499 | return retval; |
| 500 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 501 | EXPORT_SYMBOL_GPL(videobuf_reqbufs); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 502 | |
| 503 | int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
| 504 | { |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 505 | int ret = -EINVAL; |
| 506 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 507 | videobuf_queue_lock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 508 | if (unlikely(b->type != q->type)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 509 | dprintk(1, "querybuf: Wrong type.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 510 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 511 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame] | 512 | if (unlikely(b->index >= VIDEO_MAX_FRAME)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 513 | dprintk(1, "querybuf: index out of range.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 514 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 515 | } |
| 516 | if (unlikely(NULL == q->bufs[b->index])) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 517 | dprintk(1, "querybuf: buffer is null.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 518 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 519 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 520 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 521 | videobuf_status(q, b, q->bufs[b->index], q->type); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 522 | |
| 523 | ret = 0; |
| 524 | done: |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 525 | videobuf_queue_unlock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 526 | return ret; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 527 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 528 | EXPORT_SYMBOL_GPL(videobuf_querybuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 529 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 530 | int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 531 | { |
| 532 | struct videobuf_buffer *buf; |
| 533 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 534 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 535 | int retval; |
| 536 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 537 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 538 | |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 539 | if (b->memory == V4L2_MEMORY_MMAP) |
| 540 | down_read(¤t->mm->mmap_sem); |
| 541 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 542 | videobuf_queue_lock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 543 | retval = -EBUSY; |
| 544 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 545 | dprintk(1, "qbuf: Reading running...\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 546 | goto done; |
| 547 | } |
| 548 | retval = -EINVAL; |
| 549 | if (b->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 550 | dprintk(1, "qbuf: Wrong type.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 551 | goto done; |
| 552 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame] | 553 | if (b->index >= VIDEO_MAX_FRAME) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 554 | dprintk(1, "qbuf: index out of range.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 555 | goto done; |
| 556 | } |
| 557 | buf = q->bufs[b->index]; |
| 558 | if (NULL == buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 559 | dprintk(1, "qbuf: buffer is null.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 560 | goto done; |
| 561 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 562 | MAGIC_CHECK(buf->magic, MAGIC_BUFFER); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 563 | if (buf->memory != b->memory) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 564 | dprintk(1, "qbuf: memory type is wrong.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 565 | goto done; |
| 566 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 567 | if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 568 | dprintk(1, "qbuf: buffer is already queued or active.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 569 | goto done; |
| 570 | } |
| 571 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 572 | switch (b->memory) { |
| 573 | case V4L2_MEMORY_MMAP: |
| 574 | if (0 == buf->baddr) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 575 | dprintk(1, "qbuf: mmap requested " |
| 576 | "but buffer addr is zero!\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 577 | goto done; |
| 578 | } |
Pawel Osciak | 96f2ec6 | 2010-04-21 06:44:27 -0300 | [diff] [blame] | 579 | if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT |
| 580 | || q->type == V4L2_BUF_TYPE_VBI_OUTPUT |
Antti Palosaari | 9effc72 | 2015-10-10 13:51:00 -0300 | [diff] [blame] | 581 | || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT |
| 582 | || q->type == V4L2_BUF_TYPE_SDR_OUTPUT) { |
Pawel Osciak | 96f2ec6 | 2010-04-21 06:44:27 -0300 | [diff] [blame] | 583 | buf->size = b->bytesused; |
| 584 | buf->field = b->field; |
| 585 | buf->ts = b->timestamp; |
| 586 | } |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 587 | break; |
| 588 | case V4L2_MEMORY_USERPTR: |
| 589 | if (b->length < buf->bsize) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 590 | dprintk(1, "qbuf: buffer length is not enough\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 591 | goto done; |
| 592 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 593 | if (VIDEOBUF_NEEDS_INIT != buf->state && |
| 594 | buf->baddr != b->m.userptr) |
| 595 | q->ops->buf_release(q, buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 596 | buf->baddr = b->m.userptr; |
| 597 | break; |
| 598 | case V4L2_MEMORY_OVERLAY: |
| 599 | buf->boff = b->m.offset; |
| 600 | break; |
| 601 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 602 | dprintk(1, "qbuf: wrong memory type\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 603 | goto done; |
| 604 | } |
| 605 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 606 | dprintk(1, "qbuf: requesting next field\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 607 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 608 | retval = q->ops->buf_prepare(q, buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 609 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 610 | dprintk(1, "qbuf: buffer_prepare returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 611 | goto done; |
| 612 | } |
| 613 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 614 | list_add_tail(&buf->stream, &q->stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 615 | if (q->streaming) { |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 616 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 617 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 618 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 619 | } |
Hans Verkuil | 771075b | 2010-03-13 11:47:06 -0300 | [diff] [blame] | 620 | dprintk(1, "qbuf: succeeded\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 621 | retval = 0; |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 622 | wake_up_interruptible_sync(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 623 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 624 | done: |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 625 | videobuf_queue_unlock(q); |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 626 | |
| 627 | if (b->memory == V4L2_MEMORY_MMAP) |
| 628 | up_read(¤t->mm->mmap_sem); |
| 629 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 630 | return retval; |
| 631 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 632 | EXPORT_SYMBOL_GPL(videobuf_qbuf); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 633 | |
| 634 | /* Locking: Caller holds q->vb_lock */ |
| 635 | static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock) |
| 636 | { |
| 637 | int retval; |
| 638 | |
| 639 | checks: |
| 640 | if (!q->streaming) { |
| 641 | dprintk(1, "next_buffer: Not streaming\n"); |
| 642 | retval = -EINVAL; |
| 643 | goto done; |
| 644 | } |
| 645 | |
| 646 | if (list_empty(&q->stream)) { |
| 647 | if (noblock) { |
| 648 | retval = -EAGAIN; |
| 649 | dprintk(2, "next_buffer: no buffers to dequeue\n"); |
| 650 | goto done; |
| 651 | } else { |
| 652 | dprintk(2, "next_buffer: waiting on buffer\n"); |
| 653 | |
| 654 | /* Drop lock to avoid deadlock with qbuf */ |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 655 | videobuf_queue_unlock(q); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 656 | |
| 657 | /* Checking list_empty and streaming is safe without |
| 658 | * locks because we goto checks to validate while |
| 659 | * holding locks before proceeding */ |
| 660 | retval = wait_event_interruptible(q->wait, |
| 661 | !list_empty(&q->stream) || !q->streaming); |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 662 | videobuf_queue_lock(q); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 663 | |
| 664 | if (retval) |
| 665 | goto done; |
| 666 | |
| 667 | goto checks; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | retval = 0; |
| 672 | |
| 673 | done: |
| 674 | return retval; |
| 675 | } |
| 676 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 677 | /* Locking: Caller holds q->vb_lock */ |
| 678 | static int stream_next_buffer(struct videobuf_queue *q, |
| 679 | struct videobuf_buffer **vb, int nonblocking) |
| 680 | { |
| 681 | int retval; |
| 682 | struct videobuf_buffer *buf = NULL; |
| 683 | |
| 684 | retval = stream_next_buffer_check_queue(q, nonblocking); |
| 685 | if (retval) |
| 686 | goto done; |
| 687 | |
| 688 | buf = list_entry(q->stream.next, struct videobuf_buffer, stream); |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 689 | retval = videobuf_waiton(q, buf, nonblocking, 1); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 690 | if (retval < 0) |
| 691 | goto done; |
| 692 | |
| 693 | *vb = buf; |
| 694 | done: |
| 695 | return retval; |
| 696 | } |
| 697 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 698 | int videobuf_dqbuf(struct videobuf_queue *q, |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 699 | struct v4l2_buffer *b, int nonblocking) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 700 | { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 701 | struct videobuf_buffer *buf = NULL; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 702 | int retval; |
| 703 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 704 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 705 | |
Hans Verkuil | b2dfd1a | 2010-04-28 04:05:22 -0300 | [diff] [blame] | 706 | memset(b, 0, sizeof(*b)); |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 707 | videobuf_queue_lock(q); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 708 | |
| 709 | retval = stream_next_buffer(q, &buf, nonblocking); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 710 | if (retval < 0) { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 711 | dprintk(1, "dqbuf: next_buffer error: %i\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 712 | goto done; |
| 713 | } |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 714 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 715 | switch (buf->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 716 | case VIDEOBUF_ERROR: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 717 | dprintk(1, "dqbuf: state is error\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 718 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 719 | case VIDEOBUF_DONE: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 720 | dprintk(1, "dqbuf: state is done\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 721 | break; |
| 722 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 723 | dprintk(1, "dqbuf: state invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 724 | retval = -EINVAL; |
| 725 | goto done; |
| 726 | } |
Hans Verkuil | b2dfd1a | 2010-04-28 04:05:22 -0300 | [diff] [blame] | 727 | CALL(q, sync, q, buf); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 728 | videobuf_status(q, b, buf, q->type); |
Hans Verkuil | b2dfd1a | 2010-04-28 04:05:22 -0300 | [diff] [blame] | 729 | list_del(&buf->stream); |
| 730 | buf->state = VIDEOBUF_IDLE; |
| 731 | b->flags &= ~V4L2_BUF_FLAG_DONE; |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 732 | done: |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 733 | videobuf_queue_unlock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 734 | return retval; |
| 735 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 736 | EXPORT_SYMBOL_GPL(videobuf_dqbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 737 | |
| 738 | int videobuf_streamon(struct videobuf_queue *q) |
| 739 | { |
| 740 | struct videobuf_buffer *buf; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 741 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 742 | int retval; |
| 743 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 744 | videobuf_queue_lock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 745 | retval = -EBUSY; |
| 746 | if (q->reading) |
| 747 | goto done; |
| 748 | retval = 0; |
| 749 | if (q->streaming) |
| 750 | goto done; |
| 751 | q->streaming = 1; |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 752 | spin_lock_irqsave(q->irqlock, flags); |
Trent Piepho | a991f44 | 2007-10-10 05:37:43 -0300 | [diff] [blame] | 753 | list_for_each_entry(buf, &q->stream, stream) |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 754 | if (buf->state == VIDEOBUF_PREPARED) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 755 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 756 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 757 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 758 | wake_up_interruptible_sync(&q->wait); |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 759 | done: |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 760 | videobuf_queue_unlock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 761 | return retval; |
| 762 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 763 | EXPORT_SYMBOL_GPL(videobuf_streamon); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 764 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 765 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 766 | static int __videobuf_streamoff(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 767 | { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 768 | if (!q->streaming) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 769 | return -EINVAL; |
| 770 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 771 | videobuf_queue_cancel(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 772 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 773 | return 0; |
| 774 | } |
| 775 | |
| 776 | int videobuf_streamoff(struct videobuf_queue *q) |
| 777 | { |
| 778 | int retval; |
| 779 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 780 | videobuf_queue_lock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 781 | retval = __videobuf_streamoff(q); |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 782 | videobuf_queue_unlock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 783 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 784 | return retval; |
| 785 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 786 | EXPORT_SYMBOL_GPL(videobuf_streamoff); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 787 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 788 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 789 | static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q, |
| 790 | char __user *data, |
| 791 | size_t count, loff_t *ppos) |
| 792 | { |
| 793 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 794 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 795 | int retval; |
| 796 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 797 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 798 | |
| 799 | /* setup stuff */ |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame] | 800 | q->read_buf = videobuf_alloc_vb(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 801 | if (NULL == q->read_buf) |
| 802 | return -ENOMEM; |
| 803 | |
| 804 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 805 | q->read_buf->baddr = (unsigned long)data; |
| 806 | q->read_buf->bsize = count; |
| 807 | |
| 808 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 809 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 810 | if (0 != retval) |
| 811 | goto done; |
| 812 | |
| 813 | /* start capture & wait */ |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 814 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 815 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 816 | spin_unlock_irqrestore(q->irqlock, flags); |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 817 | retval = videobuf_waiton(q, q->read_buf, 0, 0); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 818 | if (0 == retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 819 | CALL(q, sync, q, q->read_buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 820 | if (VIDEOBUF_ERROR == q->read_buf->state) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 821 | retval = -EIO; |
| 822 | else |
| 823 | retval = q->read_buf->size; |
| 824 | } |
| 825 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 826 | done: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 827 | /* cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 828 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 829 | kfree(q->read_buf); |
| 830 | q->read_buf = NULL; |
| 831 | return retval; |
| 832 | } |
| 833 | |
Hans Verkuil | 3711103 | 2010-03-28 09:22:53 -0300 | [diff] [blame] | 834 | static int __videobuf_copy_to_user(struct videobuf_queue *q, |
| 835 | struct videobuf_buffer *buf, |
| 836 | char __user *data, size_t count, |
| 837 | int nonblocking) |
| 838 | { |
Hans Verkuil | a8d54e4 | 2014-11-05 04:51:26 -0300 | [diff] [blame] | 839 | void *vaddr = CALLPTR(q, vaddr, buf); |
Hans Verkuil | 3711103 | 2010-03-28 09:22:53 -0300 | [diff] [blame] | 840 | |
| 841 | /* copy to userspace */ |
| 842 | if (count > buf->size - q->read_off) |
| 843 | count = buf->size - q->read_off; |
| 844 | |
| 845 | if (copy_to_user(data, vaddr + q->read_off, count)) |
| 846 | return -EFAULT; |
| 847 | |
| 848 | return count; |
| 849 | } |
| 850 | |
| 851 | static int __videobuf_copy_stream(struct videobuf_queue *q, |
| 852 | struct videobuf_buffer *buf, |
| 853 | char __user *data, size_t count, size_t pos, |
| 854 | int vbihack, int nonblocking) |
| 855 | { |
Hans Verkuil | a8d54e4 | 2014-11-05 04:51:26 -0300 | [diff] [blame] | 856 | unsigned int *fc = CALLPTR(q, vaddr, buf); |
Hans Verkuil | 3711103 | 2010-03-28 09:22:53 -0300 | [diff] [blame] | 857 | |
| 858 | if (vbihack) { |
| 859 | /* dirty, undocumented hack -- pass the frame counter |
| 860 | * within the last four bytes of each vbi data block. |
| 861 | * We need that one to maintain backward compatibility |
| 862 | * to all vbi decoding software out there ... */ |
| 863 | fc += (buf->size >> 2) - 1; |
| 864 | *fc = buf->field_count >> 1; |
| 865 | dprintk(1, "vbihack: %d\n", *fc); |
| 866 | } |
| 867 | |
| 868 | /* copy stuff using the common method */ |
| 869 | count = __videobuf_copy_to_user(q, buf, data, count, nonblocking); |
| 870 | |
| 871 | if ((count == -EFAULT) && (pos == 0)) |
| 872 | return -EFAULT; |
| 873 | |
| 874 | return count; |
| 875 | } |
| 876 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 877 | ssize_t videobuf_read_one(struct videobuf_queue *q, |
| 878 | char __user *data, size_t count, loff_t *ppos, |
| 879 | int nonblocking) |
| 880 | { |
| 881 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 882 | unsigned long flags = 0; |
Guennadi Liakhovetski | 7daa4a8 | 2008-04-22 14:46:03 -0300 | [diff] [blame] | 883 | unsigned size = 0, nbufs = 1; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 884 | int retval; |
| 885 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 886 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 887 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 888 | videobuf_queue_lock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 889 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 890 | q->ops->buf_setup(q, &nbufs, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 891 | |
| 892 | if (NULL == q->read_buf && |
| 893 | count >= size && |
| 894 | !nonblocking) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 895 | retval = videobuf_read_zerocopy(q, data, count, ppos); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 896 | if (retval >= 0 || retval == -EIO) |
| 897 | /* ok, all done */ |
| 898 | goto done; |
| 899 | /* fallback to kernel bounce buffer on failures */ |
| 900 | } |
| 901 | |
| 902 | if (NULL == q->read_buf) { |
| 903 | /* need to capture a new frame */ |
| 904 | retval = -ENOMEM; |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame] | 905 | q->read_buf = videobuf_alloc_vb(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 906 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 907 | dprintk(1, "video alloc=0x%p\n", q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 908 | if (NULL == q->read_buf) |
| 909 | goto done; |
| 910 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 911 | q->read_buf->bsize = count; /* preferred size */ |
| 912 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 913 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 914 | |
| 915 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 916 | kfree(q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 917 | q->read_buf = NULL; |
| 918 | goto done; |
| 919 | } |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 920 | |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 921 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 922 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 923 | spin_unlock_irqrestore(q->irqlock, flags); |
| 924 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 925 | q->read_off = 0; |
| 926 | } |
| 927 | |
| 928 | /* wait until capture is done */ |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 929 | retval = videobuf_waiton(q, q->read_buf, nonblocking, 1); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 930 | if (0 != retval) |
| 931 | goto done; |
| 932 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 933 | CALL(q, sync, q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 934 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 935 | if (VIDEOBUF_ERROR == q->read_buf->state) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 936 | /* catch I/O errors */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 937 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 938 | kfree(q->read_buf); |
| 939 | q->read_buf = NULL; |
| 940 | retval = -EIO; |
| 941 | goto done; |
| 942 | } |
| 943 | |
| 944 | /* Copy to userspace */ |
Hans Verkuil | 3711103 | 2010-03-28 09:22:53 -0300 | [diff] [blame] | 945 | retval = __videobuf_copy_to_user(q, q->read_buf, data, count, nonblocking); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 946 | if (retval < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 947 | goto done; |
| 948 | |
| 949 | q->read_off += retval; |
| 950 | if (q->read_off == q->read_buf->size) { |
| 951 | /* all data copied, cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 952 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 953 | kfree(q->read_buf); |
| 954 | q->read_buf = NULL; |
| 955 | } |
| 956 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 957 | done: |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 958 | videobuf_queue_unlock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 959 | return retval; |
| 960 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 961 | EXPORT_SYMBOL_GPL(videobuf_read_one); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 962 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 963 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 225ba90 | 2007-12-12 21:46:26 -0300 | [diff] [blame] | 964 | static int __videobuf_read_start(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 965 | { |
| 966 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 967 | unsigned long flags = 0; |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 968 | unsigned int count = 0, size = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 969 | int err, i; |
| 970 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 971 | q->ops->buf_setup(q, &count, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 972 | if (count < 2) |
| 973 | count = 2; |
| 974 | if (count > VIDEO_MAX_FRAME) |
| 975 | count = VIDEO_MAX_FRAME; |
| 976 | size = PAGE_ALIGN(size); |
| 977 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 978 | err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR); |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 979 | if (err < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 980 | return err; |
| 981 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 982 | count = err; |
| 983 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 984 | for (i = 0; i < count; i++) { |
| 985 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 986 | err = q->ops->buf_prepare(q, q->bufs[i], field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 987 | if (err) |
| 988 | return err; |
| 989 | list_add_tail(&q->bufs[i]->stream, &q->stream); |
| 990 | } |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 991 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 992 | for (i = 0; i < count; i++) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 993 | q->ops->buf_queue(q, q->bufs[i]); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 994 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 995 | q->reading = 1; |
| 996 | return 0; |
| 997 | } |
| 998 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 999 | static void __videobuf_read_stop(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1000 | { |
| 1001 | int i; |
| 1002 | |
| 1003 | videobuf_queue_cancel(q); |
Pawel Osciak | a438d6d | 2010-05-11 10:36:29 -0300 | [diff] [blame] | 1004 | __videobuf_free(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1005 | INIT_LIST_HEAD(&q->stream); |
| 1006 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 1007 | if (NULL == q->bufs[i]) |
| 1008 | continue; |
| 1009 | kfree(q->bufs[i]); |
| 1010 | q->bufs[i] = NULL; |
| 1011 | } |
| 1012 | q->read_buf = NULL; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1013 | } |
| 1014 | |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 1015 | int videobuf_read_start(struct videobuf_queue *q) |
| 1016 | { |
| 1017 | int rc; |
| 1018 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1019 | videobuf_queue_lock(q); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 1020 | rc = __videobuf_read_start(q); |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1021 | videobuf_queue_unlock(q); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 1022 | |
| 1023 | return rc; |
| 1024 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1025 | EXPORT_SYMBOL_GPL(videobuf_read_start); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 1026 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1027 | void videobuf_read_stop(struct videobuf_queue *q) |
| 1028 | { |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1029 | videobuf_queue_lock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1030 | __videobuf_read_stop(q); |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1031 | videobuf_queue_unlock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1032 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1033 | EXPORT_SYMBOL_GPL(videobuf_read_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1034 | |
| 1035 | void videobuf_stop(struct videobuf_queue *q) |
| 1036 | { |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1037 | videobuf_queue_lock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1038 | |
| 1039 | if (q->streaming) |
| 1040 | __videobuf_streamoff(q); |
| 1041 | |
| 1042 | if (q->reading) |
| 1043 | __videobuf_read_stop(q); |
| 1044 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1045 | videobuf_queue_unlock(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1046 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1047 | EXPORT_SYMBOL_GPL(videobuf_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1048 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1049 | ssize_t videobuf_read_stream(struct videobuf_queue *q, |
| 1050 | char __user *data, size_t count, loff_t *ppos, |
| 1051 | int vbihack, int nonblocking) |
| 1052 | { |
| 1053 | int rc, retval; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1054 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1055 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1056 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1057 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1058 | dprintk(2, "%s\n", __func__); |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1059 | videobuf_queue_lock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1060 | retval = -EBUSY; |
| 1061 | if (q->streaming) |
| 1062 | goto done; |
| 1063 | if (!q->reading) { |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 1064 | retval = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1065 | if (retval < 0) |
| 1066 | goto done; |
| 1067 | } |
| 1068 | |
| 1069 | retval = 0; |
| 1070 | while (count > 0) { |
| 1071 | /* get / wait for data */ |
| 1072 | if (NULL == q->read_buf) { |
| 1073 | q->read_buf = list_entry(q->stream.next, |
| 1074 | struct videobuf_buffer, |
| 1075 | stream); |
| 1076 | list_del(&q->read_buf->stream); |
| 1077 | q->read_off = 0; |
| 1078 | } |
Hans Verkuil | 0e0809a | 2010-09-26 09:01:26 -0300 | [diff] [blame] | 1079 | rc = videobuf_waiton(q, q->read_buf, nonblocking, 1); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1080 | if (rc < 0) { |
| 1081 | if (0 == retval) |
| 1082 | retval = rc; |
| 1083 | break; |
| 1084 | } |
| 1085 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1086 | if (q->read_buf->state == VIDEOBUF_DONE) { |
Hans Verkuil | 3711103 | 2010-03-28 09:22:53 -0300 | [diff] [blame] | 1087 | rc = __videobuf_copy_stream(q, q->read_buf, data + retval, count, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1088 | retval, vbihack, nonblocking); |
| 1089 | if (rc < 0) { |
| 1090 | retval = rc; |
| 1091 | break; |
| 1092 | } |
| 1093 | retval += rc; |
| 1094 | count -= rc; |
| 1095 | q->read_off += rc; |
| 1096 | } else { |
| 1097 | /* some error */ |
| 1098 | q->read_off = q->read_buf->size; |
| 1099 | if (0 == retval) |
| 1100 | retval = -EIO; |
| 1101 | } |
| 1102 | |
| 1103 | /* requeue buffer when done with copying */ |
| 1104 | if (q->read_off == q->read_buf->size) { |
| 1105 | list_add_tail(&q->read_buf->stream, |
| 1106 | &q->stream); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1107 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1108 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1109 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1110 | q->read_buf = NULL; |
| 1111 | } |
| 1112 | if (retval < 0) |
| 1113 | break; |
| 1114 | } |
| 1115 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1116 | done: |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1117 | videobuf_queue_unlock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1118 | return retval; |
| 1119 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1120 | EXPORT_SYMBOL_GPL(videobuf_read_stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1121 | |
| 1122 | unsigned int videobuf_poll_stream(struct file *file, |
| 1123 | struct videobuf_queue *q, |
| 1124 | poll_table *wait) |
| 1125 | { |
Hans Verkuil | 0e17e9a | 2011-07-13 04:03:52 -0300 | [diff] [blame] | 1126 | unsigned long req_events = poll_requested_events(wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1127 | struct videobuf_buffer *buf = NULL; |
| 1128 | unsigned int rc = 0; |
| 1129 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1130 | videobuf_queue_lock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1131 | if (q->streaming) { |
| 1132 | if (!list_empty(&q->stream)) |
| 1133 | buf = list_entry(q->stream.next, |
| 1134 | struct videobuf_buffer, stream); |
Hans Verkuil | 0e17e9a | 2011-07-13 04:03:52 -0300 | [diff] [blame] | 1135 | } else if (req_events & (POLLIN | POLLRDNORM)) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1136 | if (!q->reading) |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 1137 | __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1138 | if (!q->reading) { |
| 1139 | rc = POLLERR; |
| 1140 | } else if (NULL == q->read_buf) { |
| 1141 | q->read_buf = list_entry(q->stream.next, |
| 1142 | struct videobuf_buffer, |
| 1143 | stream); |
| 1144 | list_del(&q->read_buf->stream); |
| 1145 | q->read_off = 0; |
| 1146 | } |
| 1147 | buf = q->read_buf; |
| 1148 | } |
| 1149 | if (!buf) |
| 1150 | rc = POLLERR; |
| 1151 | |
| 1152 | if (0 == rc) { |
| 1153 | poll_wait(file, &buf->done, wait); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1154 | if (buf->state == VIDEOBUF_DONE || |
Pawel Osciak | 9b55843 | 2010-03-29 05:16:31 -0300 | [diff] [blame] | 1155 | buf->state == VIDEOBUF_ERROR) { |
| 1156 | switch (q->type) { |
| 1157 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
| 1158 | case V4L2_BUF_TYPE_VBI_OUTPUT: |
| 1159 | case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: |
Antti Palosaari | 9effc72 | 2015-10-10 13:51:00 -0300 | [diff] [blame] | 1160 | case V4L2_BUF_TYPE_SDR_OUTPUT: |
Pawel Osciak | 9b55843 | 2010-03-29 05:16:31 -0300 | [diff] [blame] | 1161 | rc = POLLOUT | POLLWRNORM; |
| 1162 | break; |
| 1163 | default: |
| 1164 | rc = POLLIN | POLLRDNORM; |
| 1165 | break; |
| 1166 | } |
| 1167 | } |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1168 | } |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1169 | videobuf_queue_unlock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1170 | return rc; |
| 1171 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1172 | EXPORT_SYMBOL_GPL(videobuf_poll_stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1173 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1174 | int videobuf_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1175 | { |
Hans Verkuil | 0b62b73 | 2010-03-28 09:09:05 -0300 | [diff] [blame] | 1176 | int rc = -EINVAL; |
| 1177 | int i; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1178 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1179 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1180 | |
Hans Verkuil | 0b62b73 | 2010-03-28 09:09:05 -0300 | [diff] [blame] | 1181 | if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED)) { |
| 1182 | dprintk(1, "mmap appl bug: PROT_WRITE and MAP_SHARED are required\n"); |
| 1183 | return -EINVAL; |
| 1184 | } |
| 1185 | |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1186 | videobuf_queue_lock(q); |
Hans Verkuil | 0b62b73 | 2010-03-28 09:09:05 -0300 | [diff] [blame] | 1187 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 1188 | struct videobuf_buffer *buf = q->bufs[i]; |
| 1189 | |
| 1190 | if (buf && buf->memory == V4L2_MEMORY_MMAP && |
| 1191 | buf->boff == (vma->vm_pgoff << PAGE_SHIFT)) { |
| 1192 | rc = CALL(q, mmap_mapper, q, buf, vma); |
| 1193 | break; |
| 1194 | } |
| 1195 | } |
Hans Verkuil | 9739768 | 2010-09-20 17:24:30 -0300 | [diff] [blame] | 1196 | videobuf_queue_unlock(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1197 | |
Hans Verkuil | 0b62b73 | 2010-03-28 09:09:05 -0300 | [diff] [blame] | 1198 | return rc; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1199 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1200 | EXPORT_SYMBOL_GPL(videobuf_mmap_mapper); |